Key is to lock as D. Substrate is to active site.
        
                    
             
        
        
        
A hormone is a regulatory molecule that is secreted into the blood by an endocrine gland
        
             
        
        
        
The action potential spreads through an axon by depolarizing adjacent membrane to threshold.
- K+ departs the cell after Na+, which enters the cell first. Ions can move freely across the axon membrane because of the difference during the action potential.
- Because sodium contains a positive charge, the neuron becomes more positive and depolarized. Potassium channels take longer to open. As soon as the cell does open, K+ rushes out, reversing the depolarization known as repolarization.
- Sodium channels close during the peak of the action potential when potassium leaves the cell. When potassium ions are effluxed, the membrane potential is lowered or the cell becomes hyperpolarized.
- Outside of the cell, the concentration of Na+ is greater than inside the cell. while the concentration of K+ is  is greater inside the cell than outside.
learn more about action potential here: brainly.com/question/6705448
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Answer:
The Paschal mystery is one of the central concepts of Catholic faith relating to the history of salvation.
 
        
             
        
        
        
Answer:
missing - biostatics
Explanation:
Longitudinal studies differ from one-off, or cross-sectional, studies. The main difference is that cross-sectional studies interview a fresh sample of people each time they are carried out, whereas longitudinal studies follow the same sample of people over time.
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